Table 7.

Inhibition of tyrosinase activity (% ± SD) by the extracts obtained from elicitor-treated N. officinale microshoot cultures (p < 0.05 vs control, n = 6)

N. officinale microshoot culture extract		Positive control
N. officinale extract (µg dry extract/mL)	Inhibition of tyrosinase activity	Kojic acid (µg)	Inhibition of tyrosinase activity
1250	27.84 ± 0.40	5.5	30.62 ± 0.36
1000	22.03 ± 0.30	4.5	24.93 ± 0.07
750	16.69 ± 0.22	3.5	20.69 ± 0.15
500	11.05 ± 0.16	2.5	13.65 ± 0.06
250	5.41 ± 0.06	1.5	8.54 ± 0.04